
Boas Práticas de Firewall
Quiz
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Computers
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Professional Development
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Practice Problem
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Medium
Filipe Marques
Used 1+ times
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25 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual é a política padrão recomendada para INPUT em um servidor seguro?
ACCEPT
DROP
FORWARD
REJECT
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
O que acontece se não houver regras específicas após definir `iptables -P INPUT DROP`?
Todo tráfego será permitido.
Todo tráfego de entrada será bloqueado.
Apenas tráfego de saída será bloqueado.
O sistema continuará funcionando normalmente sem impacto.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Para que serve o comando `iptables -A INPUT -p tcp --dport 22 -j ACCEPT`?
Bloquear tráfego SSH.
Permitir conexões SSH.
Reiniciar o serviço SSH.
Criar uma nova regra para saída SSH.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual dos comandos abaixo protege contra ataques de força bruta?
`iptables -A INPUT -p tcp --dport 22 -m limit --limit 3/min --limit-burst 5 -j ACCEPT`
`iptables -A INPUT -p icmp -j ACCEPT`
`iptables -A FORWARD -j ACCEPT`
`iptables -P INPUT ACCEPT`
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
O que faz o comando `iptables -A INPUT -i lo -j ACCEPT`?
Permite conexões externas.
Bloqueia tráfego na interface loopback.
Permite tráfego na interface loopback.
Bloqueia pacotes ICMP.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual destes comandos bloqueia tráfego de um IP específico?
`iptables -A INPUT -s 192.168.1.100 -j DROP`
`iptables -A OUTPUT -d 192.168.1.100 -j ACCEPT`
`iptables -A FORWARD -s 192.168.1.100 -j ACCEPT`
`iptables -A INPUT -p tcp --dport 80 -j ACCEPT`
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
O comando `iptables -P FORWARD DROP` é necessário quando:
O servidor atua como Router.
Queremos impedir encaminhamento de tráfego entre redes.
Queremos bloquear ICMP.
Desejamos libertar conexões HTTPS.
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